Participate in rush. If you're still feeling this way after Preference Night, don't sign a Pref Card (or complete one electronically).
Your concerns are valid... but it seems like you're getting a one-sided view of things from those who DON'T want you to go Greek. Of course, it's too late to get an "unbiased" opinion from sorority women at your school, because by now, talking to them outside of rush events could get them in trouble. BUT you'll learn a lot just by participating in rush and talking to new girls, finding out what it is they love about the sorority, etc.
I don't think it is a good idea to pledge and then drop out, but that's just me. Depending on what school you go to, there's also a possibility that you could wait until next year to pledge.
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